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Finding the Fourth Proportional to 15,107.76, 20,847.48 and 8,392.56

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Solution

The fourth proportional to 15,107.76, 20,847.48 and 8,392.56 is: 11,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.76 : 20,847.48 = 8,392.56 : x
  2. Step 2: Convert to fraction form
    15,107.76/20,847.48 = 8,392.56/x
  3. Step 3: Cross multiply
    15,107.76x = 20,847.48 × 8,392.56
  4. Step 4: Simplify right side
    15,107.76x = 174,963,726.75
  5. Step 5: Solve for x
    x = 174,963,726.75/15,107.76
  6. Step 6: Final answer
    x = 11,581.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.